Ms Rudd welcomed her successor Sajid Javid to the role, but warned that the UK's terror threat level remained at severe.

She told MPs in the Commons today: "Last year we had five terror attacks that got through and 36 innocent people that were killed.

"Could I invite the Prime Minister to share our admiration for the extraordinary work and bravery that is done by our counter terror for policing, our emergency services and security services which I know we are all grateful for."

Mrs May added: "The work my Right Honourable Friend did with the internet companies in terms of keeping people safe on the internet was groundbreaking.

"Can I also share with her the support and admiration for the work that all in our emergency services, in our police, in our counter terrorism police and security and intelligence agencies do, for all that they do to keep us safe.

"And also commend her for all the work she did following the terrorist attacks last year to set and train to continue to make sure that those services get the support they need to be able to continue to make us safe."